Edexcel IAL Chemistry A2 Slope and Intercept

Edexcel IAL Chemistry A2 Slope and Intercept
Pearson Edexcel International Advanced Subsidiary/Advanced Level in Chemistry, Issue 1, September 2017Chemistry XCH11/YCH11

Practise Edexcel IAL Chemistry slope skills by finding gradients from best-fit graph lines, showing graph working and attaching units when required.

How this is tested

  • Calculate gradients from best-fit graph lines using two points on the line and show working on the graph.
  • Attach appropriate units to gradients when axes carry quantities such as entropy change and reciprocal temperature.

Question 18(c)(iii)

[Maximum number: 1]

This question is about the homogeneous system

H2( g)+I2( g)⇌2HI( g)\mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{HI}(\mathrm{~g})

Chemist B determined the value of K_c at five different temperatures.

Table for Question 18(c)(iii) — Edexcel A-Level Chemistry A2

Determine the gradient of your graph.

You must show your working on the graph.